flyboy1100
Full Access Member
- Joined
- May 23, 2014
- Posts
- 1,024
- Reaction score
- 9
- Location
- UsA
- First Name
- me
- Truck Year
- 1986
- Truck Model
- k1500
- Engine Size
- 305, 700r4??, 3.42 gears
so truck was running great for about 100 miles after carb rebuild and tune up. timing set to 12 degrees (maybe that is too much, will probably back it down to 8, emissions sticker says 4 @ 550 and my idle is set to 700). 305 engine, 700r4, 3.42 gears, 265/70r15 tires
anyway, after a lively accleration today it shifted to OD at about 55mph and then shuddered and bucked a bit. let off the gas, it stopped, hit the gas did it again. shifted to D and it went away. a few miles later shifted back to OD and all was well for the rest of the day (about 20 miles of mixed driving)
fast forward to this evening leaving work, hit the interstate and it started again, speeds 75mph, shuddered and bucked no matter what I did, had to drive home in D (40 miles)
closer I got to home and slower speeds i tried OD again. it would shift normally and run OK @55mph, but as soon as I hit the gas, it would sound a bit like a diesel and shudder. even when in Drive.
like i stated earlier, timing set to 12, i checked it tonight thinking maybe it backed off again, and it is still set to 11, unless i read the timing marks wrong, then it could be a lot lower. going to check tomorrow when the light is better.
so transmission problem or engine problem? also, other than bringing to a transmission shop, where do I go from here? kinda bummed out as i was just thinking I had all the mechanical issues pretty well squared away
anyway, after a lively accleration today it shifted to OD at about 55mph and then shuddered and bucked a bit. let off the gas, it stopped, hit the gas did it again. shifted to D and it went away. a few miles later shifted back to OD and all was well for the rest of the day (about 20 miles of mixed driving)
fast forward to this evening leaving work, hit the interstate and it started again, speeds 75mph, shuddered and bucked no matter what I did, had to drive home in D (40 miles)
closer I got to home and slower speeds i tried OD again. it would shift normally and run OK @55mph, but as soon as I hit the gas, it would sound a bit like a diesel and shudder. even when in Drive.
like i stated earlier, timing set to 12, i checked it tonight thinking maybe it backed off again, and it is still set to 11, unless i read the timing marks wrong, then it could be a lot lower. going to check tomorrow when the light is better.
so transmission problem or engine problem? also, other than bringing to a transmission shop, where do I go from here? kinda bummed out as i was just thinking I had all the mechanical issues pretty well squared away